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https://github.com/rust-lang/rust
synced 2024-09-05 16:57:03 +00:00
5c414094ac
When a method not found on a type parameter could have been provided by any
of multiple traits, suggest each trait individually, instead of a single
suggestion to restrict the type parameter with *all* of them.
Before:
```
error[E0599]: the method `cmp` exists for reference `&T`, but its trait bounds were not satisfied
--> $DIR/method-on-unbounded-type-param.rs:5:10
|
LL | (&a).cmp(&b)
| ^^^ method cannot be called on `&T` due to unsatisfied trait bounds
|
= note: the following trait bounds were not satisfied:
`T: Ord`
which is required by `&T: Ord`
`&T: Iterator`
which is required by `&mut &T: Iterator`
`T: Iterator`
which is required by `&mut T: Iterator`
help: consider restricting the type parameters to satisfy the trait bounds
|
LL | fn g<T>(a: T, b: T) -> std::cmp::Ordering where T: Iterator, T: Ord {
| +++++++++++++++++++++++++
```
After:
```
error[E0599]: the method `cmp` exists for reference `&T`, but its trait bounds were not satisfied
--> $DIR/method-on-unbounded-type-param.rs:5:10
|
LL | (&a).cmp(&b)
| ^^^ method cannot be called on `&T` due to unsatisfied trait bounds
|
= note: the following trait bounds were not satisfied:
`T: Ord`
which is required by `&T: Ord`
`&T: Iterator`
which is required by `&mut &T: Iterator`
`T: Iterator`
which is required by `&mut T: Iterator`
= help: items from traits can only be used if the type parameter is bounded by the trait
help: the following traits define an item `cmp`, perhaps you need to restrict type parameter `T` with one of them:
|
LL | fn g<T: Ord>(a: T, b: T) -> std::cmp::Ordering {
| +++++
LL | fn g<T: Iterator>(a: T, b: T) -> std::cmp::Ordering {
| ++++++++++
```
Fix #108428.
27 lines
979 B
Plaintext
27 lines
979 B
Plaintext
error[E0599]: the method `clone` exists for struct `Bar<NotClone>`, but its trait bounds were not satisfied
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--> $DIR/derive-assoc-type-not-impl.rs:18:30
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LL | struct Bar<T: Foo> {
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| ------------------ method `clone` not found for this struct because it doesn't satisfy `Bar<NotClone>: Clone`
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...
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LL | struct NotClone;
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| --------------- doesn't satisfy `NotClone: Clone`
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...
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LL | Bar::<NotClone> { x: 1 }.clone();
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| ^^^^^ method cannot be called on `Bar<NotClone>` due to unsatisfied trait bounds
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note: trait bound `NotClone: Clone` was not satisfied
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--> $DIR/derive-assoc-type-not-impl.rs:6:10
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LL | #[derive(Clone)]
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| ^^^^^ unsatisfied trait bound introduced in this `derive` macro
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help: consider annotating `NotClone` with `#[derive(Clone)]`
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LL + #[derive(Clone)]
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LL | struct NotClone;
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error: aborting due to 1 previous error
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For more information about this error, try `rustc --explain E0599`.
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